172037213 has 2 divisors, whose sum is σ = 172037214. Its totient is φ = 172037212.

The previous prime is 172037183. The next prime is 172037227. The reversal of 172037213 is 312730271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86899684 + 85137529 = 9322^2 + 9227^2 .

It is a cyclic number.

It is not a de Polignac number, because 172037213 - 2⁶ = 172037149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172037233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86018606 + 86018607.

It is an arithmetic number, because the mean of its divisors is an integer number (86018607).

Almost surely, 2^172037213 is an apocalyptic number.

It is an amenable number.

172037213 is a deficient number, since it is larger than the sum of its proper divisors (1).

172037213 is an equidigital number, since it uses as much as digits as its factorization.

172037213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 172037213 is about 13116.2957041994. The cubic root of 172037213 is about 556.1698808480.

Adding to 172037213 its reverse (312730271), we get a palindrome (484767484).

The spelling of 172037213 in words is "one hundred seventy-two million, thirty-seven thousand, two hundred thirteen".